Bolting-machine.



No. 890,657; .v PATENTED JUNE 16, 1908.

' J. w. JOHNSTON& 0. E. RULLMANN.

BOLTING MACHINE. \APPLIOATION FILED APR. 24, 1906.

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UNITED STATES PATENT OFFIQE.

JAMES W. JOHNSTON AND CHARLES E. RULLMANN, OF AURORA, INDIANA.

BOLTING-MACI-IINE Specification of Letters Patent.

Patented June 16, 1908.

To all whom it may concern:

Be it known that we, J AMES W. JOHNSTON and CHARLES E. RULLMANN, citizens of the United States, residing at Aurora, in the county of Dearborn and State of Indiana, have invented certain new and useful Improvements in Bolting-\Iacl1ines, of which the followingis a specification.

This invention relates to new and useful improvements in bolting machines particularly designed for screening fine grain etc.

The invention particularly contemplates a stationary frame provided with screening material of a fine mesh such as silk bolting cloth and a plurality of parallel wires strung beneath said material and designed to be operated by suitable devices to vibrate the bolting cloth.

In this connection it is a primary object of the present invention to provide a new mode of operation as above described, in which the racking and wear due to the continuous movement of the frame work, as in the old style of machines, shall be eliminated.

It is a further object to provide an apparatus in which the constituent elements are so arranged and constructed that easy access thereto for the purposes of replacement or adjustment may be had without disassembling any of the parts.

It is a further object of the invention to provide a machine of the greatest simplicity by the elimination as far as possible of all positive operating elements and by using the vibrations of the bolting wires to effect the necessary movement of the several parts.

The detailed construction will appear in the course of the following description, reference being had to the accompanying drawings forming a part of the specification like numerals designating like parts throughout the several views, wherein,

Figure 1 is a central longitudinal section. Fig. 2 is a central transverse section. Fig. 3 is a bottom plan view of the sieve showing the vibrating devices applied thereto. Fig. 4 is a similar view of the sieve, the vibrating devices being removed, and Fig. 5 is a central longitudinal section of a slightly modified embodiment of the invention.

In the practical embodiment of our invention we employ a bolting frame 1 suitably supported in a bolting machine of approved form, or by supporting members 1. The frame 1 is substantially rectangular and is provided on all sides with depending walls 2. Adjacent to the ends of the frame 1 are horizontal cross pieces 3, and the lowermost end wall 2 carries at its upper edge an angular wearing plate 4. Suitably secured to the uppermost cross bar 3 by screws 5 or other approved means are vibrating wires 6 which are arranged longitudinally of the frame in spaced parallel relation. The other ends of the wires 4 are passed over the wear plate 4 and are tightly held upon the front face of the end wall 2 by approved fastening means 7.

A screening mesh such as fine silk bolting cloth has its ends secured to the cross bars 3 and sides secured to longitudinal side strips 8. This screening mesh is designated by the numeral 9 and may be secured to the frame 1 in various ways most conducive to a vibrating action, such as by a laced suspension and the other securing means known to those skilled in the art.

In the preferred embodiment of our invention we employ novel devices for vib rating the wires 6 and the screen 9 which are shown in Fig. 3. Arranged adjacent to an approximately'transverse central line of the frame are transverse L or angle bars 10 which together with the portion of the side strips 8 between said bars in their spaced parallel relation, form an inner rectangular frame for supporting the vibrating devices. Mounted on each of the bars 1.0 in opposed relation and adjacent alternate wires 6, are pivoted bell cranks 11 designed to engage said wires, the movement of said bell cranks 11 in this operation being restricted by stop pins 12 secured to the bars 10. Guide wires 13, for which thin rods may be substituted if de sired, are arranged adjacent to the bars 10 but spaced away therefrom in parallel relation. Vibrating levers 14, are pivotally mounted, one on each of the bars 10 but on opposite sides thereof. The levers 14 are capable of a loose oscillating movement and in this movement are guided by their free ends which are supported upon the adjacent guide wire 13. The free ends of the levers 14 overlie the horizontal arm of the L bar 10 adjacent thereto and in this relation are provided with friction rollers 15 to compensate for friction in the oscillating movement of said levers.

The levers 14 are positively operated by the mechanism shown in Fig. 2 which com prises arms 16, each provided with a yoke shaped upper end 17 for the reception of the adjacent lever 14. The arms 16 are pivotally mounted at an approximately central pomt as at 18 upon supporting standards 19.

. Below their pivotal connection said arms are provided with curved extensions 20 which extend toward one another. Interposed between the extensions 20 and journaled in supporting bearings 21 is a shaft 22 which carries a cam wheel provided with a plurality of similarly arranged successively retreating cam surfaces 23 which engage the ends of the extension 20.

In the modified embodiment of the invention shown in Fig. 5, the vibrating mechanism comprises levers 25, each pivoted at approximately central point as at 26 in supporting bearings 27. The outer ends of the levers 25 are connected by tension Wires 28 in any desired manner to the vibrating wires 6. The confronting ends of said levers are engaged by the cam wheel 23 mounted adjacent thereto. The end of one lever 25 rests directly upon the periphery of said cam wheel while the end of the other lever 25 is disposed beyond the end of said cam wheel and is provided with an angular extension 29 which rests upon the periphery of said cam wheel beyond the line of contact with the end of the opposing lever 25.

In operation the wheel 23' is rotated at a high speed, approximately three hundred revolutions a minute and is driven from a pulley 24 carried upon the shaft 22. In its rotatory movement the cam surfaces thereof will engage the extensions 20, rock the arms 16, oscillate the levers 14, and swing the bell cranks 11 so as to engage the adjacent wires 6 and forcibly vibrate the same. The wires 6 in their vibrating action engage the screening cloth 9 and vibrate the same so as to agitate material therethrough. The wires 6 will of their own vibrations, restore the levers 14 and arms 16 to initial position. The oper ation is the same in Fig. 5 with the exception. that the levers 25 and tension rods 28 have a more direct action upon the rods 6. It will be readily apparent that the number of vibrations of the bolting cloth per minute is equal to the product of the number of cams 23' by the number of revolutions per minute of the roller carrying said cams. In the present instance we have shown four cams and assuming that the roller has three hundred revolutions per minute the bolting cloth 9' will be vibrated twelve hundred times per minute. Owing to the arrangement of the wires 6, the vibration will be transmitted uniformly throughout the entire area of the cloth.

Having described our invention we claim:

1. A bolting machine comprising an open ended stationary frame provided with a screening mesh, vibrating wires rigidly secured to and spanning said frame and closely associated with said mesh, pivoted levers carried by said frame and loosely engaging said wires to vibrate the same, pivoted vibrating members loosely engaging said levers to rock the same upon their pivots, pivoted vibrating elements loosely engaging said vibrating members and means loosely engaging said elements for vibrating the same.

2. A bolting machine comprising an open stationary frame provided with a screening mesh, vibrating wires rigidly secured to said frame and spanning said mesh in closely associated relation, bell-crank-levers mounted in pairs in said frame with their horizontal arms lying beneath said wires and their vertical arms opposing one another in spaced relation, oscillatory levers mounted on pivots in said frame and extending between said opposing arms of said bell-crank-lever, and means loosely engaging said oscillatory levers for rocking the same upon their pivots to strike said bell-crank-levers to agitate said wires and said screening mesh, substantially as described.

3. A bolting machine comprising an open stationary frame provided with a screening mesh, vibrating wires rigidly secured to said frame, and spanning said mesh in closely associated relation, bell-crank-levers mounted in pairs in said frame with their horizontal arms lying beneath said wires and their vertical arms opposing one another in spaced relation, oscillatory levers mounted on pivots in said frame and extending between said opposing arms of said bell-crank-hvers, pivoted levers having yoke frames atone end thereof loosely embracing said oscillatory levers, and means loosely engaging the other ends of said pivoted levers for rocking the same, substantially as described.

In testimony whereof we aflix our signa tures in presence of two witnesses.

JAMES W. JOHNSTON. CHARLES E. RULLMANN.

Witnesses CHARLES H. W. DROEGE, CASPER BiEsE. 

